Earth moving device



Feb. 1, 1938.

w. H. YOUNT EARTH MOVING DEVICE Filed Sept. 16, 1956 2 Sheets-Sheet l INVENTOR. W/'///'5 You/7f ATTORNEY.

Feb. 1, 1938.

W. H. YOUNT EARTH MOV iNG DEVICE 2 Sheets-Sheet 2 Filed Sept. 16, 1956 INVENTOR. Z /'///'5 Vaun/ ATTORNEY.

Patented Feb. 1, 1938 UNITED STATES EARTH MOVING DEVICE Willis 11. Yount, Oakland, Calif., assignor American Tractor Equipment Corporatioma corporation of California Application September 1c, 1936, Serial No. 101,113

Claims.

This invention relates to a new, and improved scraper structure and, more particularly, to an improvement upon that large earth carrier and scraper structure shown in the copending application of'John F. Knapp, Serial No. 58,552 of January 10, 1936, and Robert B. Price, Serial No.

80,726, of May 20, 1936. 1 I

The present invention is concerned with an improved mechanism for controlling the scraper blade elevation and for operating the bowl closuremeans. While the machines of the aforementioned applications were successful, the present structure is much more rugged. and, at thesame time, simpler in construction. I

It is an object of the present invention to sim plify further the operating mechanism for the bowl closure means, particularly to the end that the bowl closure means can beoperated by only a single cable in a large capacity carrier-scraper.

It is an object of the present invention to simplify the elevating mechanism on a cable operated scraper structure, to provide a simple and yet rugged structure.

The invention includes other objects and features of advantage, some of which, together with the foregoing, will appear hereinafter, wherein the present preferred scraper structure of my invention is disclosed. In the drawings accompanying and forming a part of this specification. Figure 1 is a side elevation partly in section of a scraper structure embodying my invention.

Figure 2 is a plan view, partly in section. Figure 3 is a section illustrating the detail of construction at the hinge forming point.

The frame The scraper of the present invention includes a strong steel frame H made up of a plurality of members, usually secured together. by spot 40 welding. This frame includes side member l2,

end members It, and aforward'member 14.. This member joins the side members I! and extends forwardly to provide a support for hearing It and forwardly extending uprights I l.

28 which is received in a socket 24 at the bottom of a post it. This post extends upwardly and is connected to member It by a pair of links 21 engaged with the post by shaft 28 intermediate theendsofthepost. Ashaftllinsertedin A front truck ll, including an axle ll upon hearing it connects the other link ends to member it. Another pair of links II are connected at the top of the post by shaft SI and to the upright H by shaft 32. The links 2! and "provide a parallel linkage connection between the scraper frame and the front truck post 26. Wheels 36 are provided at the rear of the frame in pairs, each pair being mounted upon an axis 31, each axle being carried in. the supporting members ll.

The bowl Secured to the frame members i! are suitable side plates 4| Between these side plates are ex tended a bottom plate 42 and an arcuate plate 43. At their forward ends these plates are joined together and thus provide a lip to which is attached a suitable cutting blade 46, bolts 41 being usually utilized forthis purpose so that the cutting blade can bereadily changed or replaced.

Upon advancing the scraper over the ground the cutting blade 48 will cut on and pick up earth,

- this earth being deposited upon the arcuate plate 43 to be retained therein.

Since the point at which it is desired to dump a load from the scraper may bea considerable distance from the point at which the load is picked up, since transportation of the load may result in accidental discharge of a part thereof, I provide means for retainingthe earth in the howl. This means is shown as comprising two arms 55 carried upon stub shafts '58 which are in turn carried by brackets 49 on side frame members l2. 'i'hese arms extend forwardly and provide a hoe-like door structure with transverse plates II and II which are welded between the arms II. It is to be noted that plate 5| engages the cutting blade and thus insures a tight closure for the bowl.

To provide for removal of earth carried upon the bowl I support another pair of arms 6! from stub shafts l8 and extend between these arms an and gate in the form of a plate .2. His to be noted that the center of curvature of the arcuate plate 43 is the center of'the stub sh'afts 48 and that plate 62 will sweep over and wipe-offearth pon the plate 43 so that the bowl can be readily emptied.

The blade elevating mechanism 1 ried by rearwardly extending arm II on the post .26. A second pulley structure indicated at." is

. The closure and end gate operating mechanism In accordance with this invention, a very simple and yet practical form. of cable operating mechanism'is provided for the door and the end sate structure. An offset arm 82 extends rearwardly from the upright I! which is carried by the forward part of the frame portion H. The arm 82 carries a multi-groove pulley 88 carrying a cable 85 which extends forwardly over guide pulley 88 on extension I! and through a guide pulley I! on the other side of post I! to another guide pulley 88 on extension 8! tea suitable cable operating mechanism on the tractor. The cable .85 is extended between the multi-groove pulley 83 and a like pulley It, the end of the cable being secured to the frame adjacent pulley II. The pulley 89 is supported in a link structure 80 which in turn is carried by a shaft II on ,the end closure or door. Plates II and ii are so connected that a recess is provided between them. The link structure permits raising of the door to the maximum height, enabling the pulley ll to swing out clear of the door as it is raised.

It is to be noted that arms ii each include an outwardly extending extension ill thereon and that from each of arms 45 an ear Ill projects over each of the extensions Ill so that arms I! 7 can only be moved a limited distance before ears III engage the extension ill. Thereafter, further rotational movement of arms about the stub shafts will result in a rocking of the end gate I! over the base of the bowl until finally the end gate is in the dot line position shown in Figure l, and the closure means, including arms II, have been moved to the extreme or uppermost position in which they appear in dotted lines in Figure 1.

To provide for the return of the end gate I extend a spring Ill in the frame it transversely on the scraper bowl so as to secure a goodly length thereof. A piston I engages an end of this spring and to this piston is attached a cable I N. This cable isextended to theend gate about suitable guide pulleys I" so that when the end gate is moved forward it is only against the bias of the spring so that the spring always urges the and gate to return to that position in which it appears in Figure 1.

Operation While it is believed that the operation of the structure is relatively clear from the foregoing description, it will be again pointed out upon a pulling of cable ii, a raising and lowering of the cutting blade relative to the edge can be secured the cable passing over suitable pulleys provided between the frame of the scraper and the post 26, to raise and lower the two pairs of links relative to each other.

As to operation of the bowl, once the bowl is filled itis raised relative to the earth, the door or closure means provided by anns II and plates ill and Si being lowered into position. Normally the scraperis operated in about that position in which it appears in Pig. 1 with the scraper blade in contact with the earth, the door being raised to the position shown in the dash lines. When the closure means is to be lowered, the operator simply releases. the tension upon cable 85, the weight of the closure means causing it to drop into the full line position and plates ii will be in engagement with the cutting blade 46 while' continued rotation of the arms 45 and rotation of closure 62. This gradual raising of the closure means brings it into that position in which it appears in Figure l, well elevated above the bowl and the-closure 82 into a position wherein all-dirt has been swept oil the bowl.

During the movement of the end gate the spring has of course been placed under "tension so that, upon the operator releasing the cable II, the end gate 62 is returned while the weight of the closure means causes it to rotate about the stub shafts and return to the full line position in which it appears in Fig. 1 The operator usually stops the fall of the door when it is in an intermediate position and spaced from the bowl so that earth can be scraped up and gathered in the bowl.

It is to be pointed out that the load on the dirt moving gate is substantially uniform. Thus when the gate is first moved the load is made up of dirt on the bowl and little if any power is demanded by the spring. As the dirt is forced out over the cutting edge the dirt load decreases but more power is demanded by the spring. This results in a uniform loading on the cables. The door position enables the operator to judge the operation of cleaning the bowl accurately.

I claim:

1. A scraper comprising a bowl, means for discharging dirt therefrom including a gate supported above said bowl and movable thereover to dischargedirt, thereon, closure means for said bowl hinged above said bowl and movable from abowl closing position to a raised position above the bowl, said closure means including arms adjacent each side of said bowl, means extending from said gate and engaging said arms only after opening movement. of said closure means, and

means for moving said gate including a pulley carried by said gate, a pulley supported above said gate and a cable extended between said -pulleys.

2. In a scraper, a frame providing an opening, wheels at the rear end thereof, means supporting the front end of said frame, a bowl carried by said frame and extending from in front of said wheels toward said frame front end, an end gate for ejecting dirt from'said bowl, a door for closing said bowl supported for hinged travel from a bowl closing position to a raised position, means supporting said gate over said bowl, a pulley on said door, a second pulley carried adjacent said frame front end, a, cable extended between said pulleys for lifting said door, and means connecting said gate to said door to move said gate con-J currently with said door at least during a portion of the travel of said door.

3. In a scraper, a frame having a front end, a bowl mounted on said frame to the rear of said front end, a door for closing said bowl including a bowl engaging portion and a forwardly and upward ly extending portion supplementing said bowl as a dirt carrier, a first pulley on said door adjacent said forward end, a second pulley carried on said front end above said bowl, a cable extended between said pulleys, and a link hinged on said door adjacent said bowl engaging portion and interposed between said door and the first pulley to swing said pulley free of said door upon lifting of said door. 7

4. In a scraper, a frame having a front end, a bowl mounted on said frame to the rear of said front end, a door for closing said bowl and movable from a bowl closing to a bowl opening position, a first pulley carried by said door, a second pulley carried on said front end, a cable extending between said pulleys to lift said door, a gate positioned above said'bowl, and means interengaging said gate and said door to move said gate with said door-only after initial movement of said door away from said bowl.

5. In a scraper, a dirt carrying bowl having a cutting blade to cut and deliver dirt to said bowl, 9. door supplementing said bowl and including a blade engaging portion and an extending portion providing a supplemental bowl portion when said door is in blade engaging position, a gate movable over said bowl to eject dirt therefrom, means connecting said gate to saiddoor for concurrent movement with said door at least during a portion of the travel of said door, a link hinged on said door adjacent the blade engaging'portion of the door, said link extending along said door ina recessed portion of the door, a pulley on the link, a second pulley, means supporting said second pulley elevated above said door in blade engaging position, and a flexible element trained over said pulleys and movable to lift said door until said link swings out of said recessed portion.

WILLIS H. YOUNT. 

